KR100782930B1 - Apparatus and method for relaying capability negotiation in a multi-hop relay broadband wireless access communication system - Google Patents

Abstract

The present invention relates to an apparatus and a method for negotiating relay station function in a cellular communication system using a multi-hop relay method. The present invention relates to a first message including first relay capability information on whether a node supports the relay station capability. Configuring and transmitting to the base station, and whether the base station receiving the first message selects the node as a relay station, and according to the determination, second relay capability information on whether the node is selected as a relay station; Comprising a second message comprising the step of transmitting to the node, the node receiving the second message performs the role of a relay station or the role of a normal node according to the received second relay capability information A signaling procedure necessary for determining whether a relay station of the node is operating, There is an advantage that can be provided.

Relay communication system, relay station, relay station function negotiation

Description

Apparatus and method for negotiating relay station function in a broadband wireless access communication system using a multi-hop relay method

1 is a view schematically showing the structure of a general IEEE 802.16e communication system;

2 is a diagram schematically illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme for expanding a base station service area;

3 is a diagram schematically illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme for increasing system capacity;

4 is a diagram illustrating a signal flow between a node and a base station for negotiation of a relay station function support during direct communication with a base station in a broadband wireless communication system using a multi-hop relay method according to an embodiment of the present invention;

5 is a diagram illustrating a signal flow between a node, an upper relay station, and a base station for negotiation of relay station function support during relay communication with an upper relay station in a broadband wireless communication system using a multi-hop relay method according to an embodiment of the present invention;

6 is a diagram illustrating a signal flow between a node and a base station for negotiation of a relay station function support during direct communication with a base station in a broadband wireless communication system using a multi-hop relay method according to another embodiment of the present invention;

FIG. 7 is a diagram illustrating a signal flow between a node, an upper relay station, and a base station for negotiation of relay station function support during relay communication with an upper relay station in a broadband wireless communication system using a multi-hop relay method according to another embodiment of the present invention. , And

8 is a block diagram of a node (or higher relay station or base station) according to an embodiment of the present invention.

9 is a diagram illustrating a signal flow between a node, an upper relay station, and a base station for negotiation of relay station function support in a broadband wireless communication system using a multi-hop relay method according to another embodiment of the present invention.

The present invention relates to a broadband wireless access communication system using a multi-hop relay scheme, and more particularly, to an apparatus and a method for negotiating relay station function.

In the 4th Generation (hereinafter, referred to as '4G') communication system, providing users with services having various quality of service (QoS) with a transmission rate of about 100 Mbps. Active research is underway. In particular, in the current 4G communication system, broadband wireless access such as a wireless local area network (LAN) system and a wireless urban area network (MAN) system Access: Research is being actively conducted to support high-speed services in the form of guaranteeing mobility and quality of service (QoS) in a BWA communication system, and the representative communication system is IEEE (Institute of Electrical). and Electronics Engineers) 802.16a communication system and IEEE 802.16e communication system.

The IEEE 802.16a communication system and the IEEE 802.16e communication system are orthogonal frequency division multiplexing (OFDM) for supporting a broadband transmission network on a physical channel of the wireless MAN system. (Orthogonal Frequency Division Multiple Access (hereinafter referred to as 'OFDMA')). The IEEE 802.16a communication system is a system currently considering only a single cell structure and a state in which a subscriber station (hereinafter referred to as SS) is fixed, that is, no mobility of the SS is considered. In contrast, the IEEE 802.16e communication system is a system that considers the mobility of the SS in the IEEE 802.16a communication system, and an SS having the mobility is referred to as a mobile station (hereinafter, referred to as an MS). .

1 is a diagram schematically illustrating a structure of a general IEEE 802.16e communication system.

Referring to FIG. 1, the IEEE 802.16e communication system has a multi-cell structure, that is, a base station (BS) 110 having a cell 100 and a cell 150 and managing the cell 100. ), A base station 140 that manages the cell 150, and a plurality of MSs 111, 113, 130, 151, and 153. Here, signal transmission and reception between the base stations 110 and 140 and the MSs 111, 113, 130, 151, and 153 is performed using the OFDM / OFDMA scheme. The MS 130 among the MSs 111, 113, 130, 151, and 153 exists in a boundary region of the cell 100 and the cell 150, that is, a handover region. That is, when the MS 130 moves toward the cell 150 managed by the base station 140 while transmitting and receiving a signal with the base station 110, a serving BS of the MS 130 is connected to the base station 110. From 110 to the base station 140 is changed.

In the general IEEE 802.16e communication system, as shown in FIG. 1, since signaling is transmitted and received through a direct link between a fixed base station and an MS, a reliable wireless communication link can be easily configured between the base station and the MS. However, the IEEE 802.16e communication system has a low flexibility in configuring a wireless network since the location of the base station is fixed, and thus, it is difficult to provide an efficient communication service in a wireless environment in which traffic distribution or call demands are severe.

In order to overcome this disadvantage, a multi-hop relay data transfer scheme may be applied to a general cellular wireless communication system such as the 802.16e communication system using a relay station, a relay station having a mobility, or a general MS. have. As a result, the wireless communication system using the multi-hop relay scheme can quickly reconfigure the network in response to environmental changes, and more efficiently operate the entire wireless network. A wireless communication system using the multi-hop relay scheme can expand a cell service area and increase system capacity. That is, when the channel state between the base station and the MS is poor, by providing a relay station between the base station and the MS to configure a multi-hop relay path through the relay station, it is possible to provide a more excellent radio channel to the MS. In addition, by using the multi-hop relay scheme in a cell boundary region having a poor channel state from a base station, it is possible to provide a faster data channel and expand a cell service area.

2 is a diagram schematically illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme.

Referring to FIG. 2, the multi-hop relay wireless communication system has a multi-cell structure, that is, a base station (BS) having a cell 200 and a cell 240 and managing the cell 200 ( 210, a base station 250 that manages the cell 240, a plurality of MSs 211, 213 located in an area of the cell 200, and the base station 210 manage the cell 200. ) Provides a multi-hop relay path between the plurality of MSs 221, 223 in the region 230 outside the region and the MSs 221, 223 in the region 230. Relay station 220, a plurality of MSs 251, 253, 255 located within the area of the cell 240, and the base station 250, but are located in an area 270 outside the area of the cell 240 It is composed of a plurality of MSs 261 and 263 and a relay station 260 that provides a multi-hop relay path between the base station 250 and the MSs 261 and 263 present in the region 270. Here, signal transmission and reception between the base stations 210 and 250, the relay stations 220 and 260, and the MSs 211, 213, 221, 223, 251, 253, 255, 261 and 263 are performed in the OFDM / OFDMA. Is done using the method. In this case, the MSs 211 and 213 and the RS 220 included in the cell 200 area may directly transmit and receive a signal to or from the base station 210, but the MSs present in the area 230 may be used. 221 and 223 do not directly transmit and receive signals with the base station 210. Accordingly, the relay station 220 controls the area 230, relays a signal between the base station 210 and the MSs 221 and 223 that cannot directly transmit and receive a signal as described above, 221 and 223 may transmit and receive signals to and from the base station 210 through the relay station 220. In addition, although the MSs 251, 253, and 255 included in the cell 240 region and the RS 260 may directly transmit and receive signals with the base station 250, the MSs present in the region 270 may be used. The fields 261 and 263 may not directly transmit / receive signals with the base station 250. Accordingly, the relay station 260 manages the area 270, relays a signal between the base station 250 and the MSs 261 and 263, which cannot directly transmit and receive a signal as described above, and relays a signal between the MSs ( 261 and 263 may transmit / receive a signal with the base station 250 through the relay station 260.

3 is a diagram schematically illustrating a structure of a broadband wireless communication system using a multi-hop relay scheme for increasing system capacity.

Referring to FIG. 3, the multi-hop relay wireless communication system provides a base station 310 and a plurality of MSs 311, 313, 321, 323, 331, and 333 and a multi-hop relay path between the base station and the MS. It consists of the relay stations (320, 330). Here, signal transmission and reception between the base station 310 and the relay stations 320 and 330 and the MSs 311, 313, 321, 323, 331 and 333 are performed using the OFDM / OFDMA scheme. The base station 310 manages the cell 300, and the MSs 311, 313, 321, 323, 331, and 333 and the relay stations 320 and 330 included in the cell 300 area are connected to the base station ( 310 may directly transmit and receive a signal. However, when the MS is located near the edge of the cell 300, such as the MSs 321, 323, 331, 333, the base station 310 and the MSs 321, 323, 331, 333 The received signal-to-noise ratio (hereinafter referred to as 'SNR') of the direct link therebetween may be low. Accordingly, the relay station 320 relays unicast traffic between the base station 310 and the MSs 321 and 323, and the MSs 321 and 323 communicate with the base station 310 through the relay station 320. ) Can transmit and receive unicast traffic. In addition, the relay station 330 relays unicast traffic between the base station 310 and the MSs 331 and 333, and the MSs 331 and 333 communicate with the base station 310 through the relay station 330. ) Can send and receive u-cast traffic. That is, the RSs 320 and 330 provide high-speed data transmission paths to the MSs 321, 323, 331, and 333, thereby increasing effective transmission rates and increasing system capacity of the MSs.

Here, the relay stations 220, 260, 320, 330 constituting the broadband wireless communication system using the multi-hop relay of FIG. 2 or 3 are installed and managed by the base stations 210, 250, 310. An infrastructure relay station or the mobile terminal such as the SS or the MS may be a client relay station supporting a relay function. In addition, the relay stations 220, 260, 320, and 330 may be fixed relay stations without mobility, nomadic relay stations with nomadic characteristics, or mobile relay stations with mobility such as the MS.

In the wireless communication system using the multi-hop relay scheme as described above, a relay station capable of supporting a relay between the terminal and the base station is selected by the base station, and the base station increases the capacity of the wireless communication system and expands the service area of the base station. A potential relay station can be selected as a relay station with the criteria of. Accordingly, in the wireless communication system using the multi-hop relay method, the base station recognizes the potential relay station and performs negotiation with the potential relay station for support during the initial access procedure with the potential relay station. You need to define the procedure.

An object of the present invention is to provide an apparatus and method for notifying whether a node performing an initial access procedure supports a relay station function in a broadband wireless access communication system using a multi-hop relay scheme.

It is still another object of the present invention to provide an apparatus and method for recognizing a potential relay station performing an initial access procedure by a base station in a broadband wireless access communication system using a multi-hop relay method, and performing relay station function support negotiation with the potential relay station. In providing.

According to an embodiment of the present invention to achieve the above object, a method for negotiating a relay station function in a communication system comprises a first message including first relay capability information on whether a node supports the relay station capability of the node; Determining whether to select the node as a relay station, and transmitting second relay capability information on whether the node is selected as a relay station according to the determination. Constructing and transmitting a second message to the node; and receiving, by the node receiving the second message, a role of a relay station or a role of a general node according to the received second relay capability information. Characterized in that it comprises a.

According to another embodiment of the present invention to achieve the above object, a method for negotiating relay station function in a communication system includes a first message including first relay capability information on whether a node supports relay station capability of the node; Configuring and transmitting to the upper relay station, and when the upper relay station receiving the first message determines whether the node supports the relay station function, and determines that the node supports the relay station function, Constructing a second message including first relay capability information and identifier information, and transmitting the second message to a base station; determining whether the base station receiving the second message selects the node as a relay station; Second relay capability information on whether the node is selected as a relay station and identifier information of the node. Constructing and transmitting a third message to the upper relay station; and transmitting, to the node, a fourth message including the second relay capability information by the upper relay station receiving the third message. And performing, by the node receiving the fourth message, a role of a relay station or a role of a general node according to the second relay capability information.

According to an embodiment of the present invention to achieve the above object, an apparatus for negotiating a relay station function in a communication system comprises a first message including first relay capability information on whether a node supports relay station capability to a base station; And when receiving a second message including second relay capability information on whether the node is selected as a relay station from the base station, performs a role of a relay station or a role of a general node according to the second relay capability information. Determining whether to select the node as a relay station when the first message is received from the node, and receiving second relay capability information on whether the node is selected as the relay station according to the determination. And comprising the base station constructing a second message comprising the message and transmitting the message to the node. It shall be.

According to another embodiment of the present invention to achieve the above object, an apparatus for negotiating a relay station function in a communication system comprises a first message including first relay capability information on whether a node supports relay station capability or not; When a fourth message is transmitted to a relay station and a fourth message including second relay capability information on whether the node is selected as a relay station is received from an upper relay station, the relay station performs a role of a relay station or a general node according to the second relay capability information. When a node that performs the role of and the first message is received from the node, it is determined whether the node supports the relay station function using the first message, and the relay station function is supported by the node. If necessary, construct a second message including first relay capability information and identifier information of the node to the base station. After transmitting, when a third message including the second relay capability information and identifier information of the node is received from the base station, a fourth message including the second relay capability information is configured and transmitted to the node. When a second message is received from the upper relay station and the upper relay station, it is determined whether to select the node as a relay station using the second message, and whether or not the node is selected as the relay station according to the determination. And the base station constructing a third message including second relay capability information and identifier information of the node and transmitting the same to the upper relay station.

According to an embodiment of the present invention to achieve the above object, a method for a node to negotiate a relay station function in a communication system comprises a first message including first relay capability information on whether the node supports the relay station capability. And transmitting a first message to an upper relay station or a base station, and receiving a second message including second relay capability information on whether the node is selected as a relay station from the upper relay station or the base station. And performing a role of a relay station or a role of a general node according to the second relay capability information.

According to an embodiment of the present invention to achieve the above object, a method for a base station to negotiate a relay station function in a communication system comprises: a first relay capability information on whether a relay station capability is supported from a node or an upper relay station; When the message is received, determining whether to select the node as a relay station, constructing a second message including second relay capability information on whether the node is selected as a relay station according to the determination; And transmitting the configured second message to the node or the upper relay station.

According to an embodiment of the present invention to achieve the above object, a method for a higher relay station to negotiate a relay station function in a communication system includes: a first relay capability information on whether the node supports the relay station capability of the node; When the message is received, determining whether the node supports the relay station function using the first message, and when it is determined that the node supports the relay station function, the first relay capability information and the identifier of the node. Constructing and transmitting a second message including information to the base station; and receiving a third message including second relay capability information on whether the node is selected as a relay station and identifier information of the node from the base station. And constructing a fourth message including the second relay capability information to the node. It characterized in that it comprises.

According to another embodiment of the present invention to achieve the above object, a method for negotiating a relay station function in a communication system includes a first message including information on whether the node supports relay station capability of the node; Configure and transmit the first message to the base station, and determine whether or not the base station receiving the first message selects the node as the relay station. Forming a second message including second relay capability information on whether the node is selected as a relay station according to the determination, and transmitting the second message to the upper relay station, and forwarding the second message to the node by the upper relay station; And the node receiving the second message according to the received second relay capability information. It characterized by comprising the step serving as the gyeguk or act as a common node.

According to another embodiment of the present invention to achieve the above object, an apparatus for negotiating relay station function in a communication system comprises a first message including first relay capability information on whether a node supports relay station capability. When a second message is transmitted to an upper relay station and a second message including second relay capability information on whether the node is selected as a relay station is received from the upper relay station, the relay station performs a role of a relay station according to the second relay capability information. A node that serves as a general node, and when the first message is received from the node, forwards the first message to a base station, and when the second message is received from the base station, the second message; Forwarding to the node, and when the indication message (INDICATE MSG) is received from the base station, Determine whether to select the node as a relay station using the first message when the first relay station acquires second relay capability information of the node using the first relay station and the first message is received from the upper relay station. In response to the determination, a second message including second relay capability information on whether the node is selected as a relay station is configured and transmitted to the upper relay station, and then the second relay capability information and the node and the upper relay station communicate with each other. And the base station for transmitting the indication message (INDICATE MSG) including parameter information necessary for performing to the upper relay station.

According to another embodiment of the present invention to achieve the above object, a method for a higher relay station to negotiate a relay station function in a communication system includes: a first relay capability information on whether a node supports relay station capability of a node; When the first message is received, forwarding the first message to a base station; and when receiving a second message including second relay capability information on whether the node is selected as a relay station from the base station, And forwarding the 2 message to the node.

According to another embodiment of the present invention to achieve the above object, a method for a base station to negotiate a relay station function in a communication system comprises: a first relay capability information on whether a node supports relay station capability from an upper relay station; When the first message is received, a process of determining whether to select the node as a relay station and a second message including second relay capability information on whether or not the node is selected as a relay station according to the determination are made. Transmitting to the upper relay station an indication message (INDICATE MSG) including the second relay capability information and parameter information necessary for the node and the upper relay station to communicate with the upper relay station. It is done.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

According to the present invention, a node performing an initial access procedure in a broadband wireless access (BWA) communication system using a multi-hop relay scheme performs negotiation for supporting a relay station function with a serving base station. We propose a signaling procedure for this.

Here, the broadband wireless access communication system using the multi-hop relay scheme, for example, orthogonal frequency division multiplexing (OFDM) scheme or orthogonal frequency division multiple access (ORDM). Access (hereinafter referred to as 'OFDMA') is a communication system that uses. Since the multi-hop wireless access communication system using the multi-hop relay method uses the OFDM / OFDMA method, high-speed data transmission is possible by transmitting a physical channel signal using a plurality of sub-carriers. It is a communication system that supports mobility of MS by supporting (multi-cell) structure.

In the following description, a broadband wireless access communication system is described as an example, but the present invention may be equally applicable to a communication system using a multi-hop relay method.

4 is a diagram illustrating a signal flow between a node and a base station for negotiation of a relay station function support during direct communication with a base station in a broadband wireless communication system using a multi-hop relay method according to an embodiment of the present invention.

Referring to FIG. 4, first, as the node 400 is powered on in step 411, the node 400 determines the base station 410 as a serving station and receives a downlink preamble transmitted by the base station 410. To obtain system synchronization with the base station. Thereafter, the node 400 performs an initial ranging procedure with the base station 410 in step 413 and an SBC to the base station 410 to perform a basic capability negotiation procedure with the base station 410 in step 415. Send a REQ message. Here, the SBC-REQ message includes basic capability information that can be supported by the node 400 to perform communication with the base station 410, for example, a physical layer parameter. In addition, the SBC-REQ message includes relay capability information on whether the node 400 supports the relay station capability according to the present invention.

Here, the relay capability information included in the SBC-REQ message according to the present invention is as shown in Table 1 below.

Name Type (1 byte) Length (bytes) Value RS capability TBD One Bit # 0: RS support; if the bit is set to 0, the node does not support relay function. if the bit is set to 1, the node supports relay function. Bit # 1: Fixed RS support Bit # 2: Nomadic RS support Bit # 3: Mobile RS support Bit # 4: infrastructure RS support Bit # 5: client RS support Bit # 6-7: reserved; shall be set to zero notes: if bit # 0 is set to zero, other bits shall be set to zero.

As shown in Table 1, the relay capability encoding information according to the present invention includes the name of the encoding (RS capability), the type of encoding (hereinafter referred to as 'TBD'), and the size of the encoding. (1 byte), contains the encoding value. Bit # 0 of the encoding value of the RS capability indicates whether the node 400 supports the relay station function. In this case, when the Bit # 0 is 0, it means that the node 400 does not support the relay station function. In this case, the remaining 7 bit values of the encoding value of the RS capability should be set to 0. If Bit # 0 of the encoding value of the RS capability is 1, it means that the node 400 supports the relay station function. In addition, Bit # 1 to Bit # 5 among the encoding values of the RS capability indicates whether the node 400 supports the function of the fixed relay station, the function of the nomadic relay station, the function of the mobile relay station, or the infrastructure. Indicates whether the relay station supports the client or the client relay station.

In step 417, the base station 410 receives the SBC-REQ message and determines whether to select the node 400 as a relay station. Here, the criterion for selecting the relay station may include expanding the service area of the base station 410 or increasing the system capacity. Thereafter, the base station 410 transmits the SBC-RSP message including the determination of the step 417 in response to the SBC-REQ message in step 419. Here, the SBC-RSP message includes all the parameters corresponding to the parameters included in the SBC-REQ message. For example, when the base station 410 receives the SBC-REQ message including the relay capability information of the <Table 1>, the base station 410 is a parameter corresponding to the relay capability information of the <Table 1> Must transmit an SBC-RSP message including.

 Here, the parameters corresponding to the relay capability information of <Table 1> included in the SBC-RSP message according to the present invention are as shown in Table 2 below.

Name Type (1 byte) Length (bytes) Value RS capability TBD One Bit # 0: RS support confirm; if the bit is set to 0, the receiver node shall not support relay function. if the bit is set to 1, the receiver node supports relay function. Bit # 1: Fixed RS support confirm Bit # 2: Nomadic RS support confirm Bit # 3: Mobile RS support confirm Bit # 4: infrastructure RS support Bit # 5: client RS support Bit # 6-7: reserved; shall be set to zero notes: if bit # 0 is set to zero, other bits shall be set to zero. notes: if each bit is set to 0 in 'RS capability' of [Table 1], the corresponding bit in [Table 2] shall not be set to 1.

As shown in Table 2, the relay capability encoding information according to the present invention includes the name of the encoding (RS capability), the encoding type (TBD), the encoding size (1 byte), and the encoding value. Include. Here, Bit # 0 among encoding values of the RS capability indicates whether the base station 410 selects the node 400 as a relay station. In this case, when Bit # 0 is 0, it means that the base station 410 does not allow the relay station function of the node 400. Accordingly, the remaining seven bits of the encoding value of the RS capability are set to 0. Should be set. When Bit # 0 of the encoding value of the RS capability is 1, it means that the base station 410 allows the relay station function of the node 400. Here, the SBC-RSP message having Bit # 0 of 1 is transmitted. The received node 400 operates as a relay station. Here, if Bit # 0 is not 1 among the encoding values of the RS capability of the SBC-REQ message received by the base station 410 in step 415, the node 400 does not support the relay station function. ) Must not set Bit # 0 to 1 in the encoding value of the RS capability of the SBC-RSP message.

In addition, Bit # 1 to Bit # 5 of the encoding value of the RS capability is to allow the fixed relay station function or nomadic relay station function or mobile relay station function of the node 400 or infrastructure relay station function. Indicates whether to allow or allow client relay functions. Here, Bit # 1 to Bit # 5 among the encoding values of the RS capability should be set according to RS capability encoding information of the SBC-REQ message received in step 415, and the function is not supported by the node 400. The corresponding bit value should be set to zero.

Meanwhile, the relay capability information included in the SBC-REQ message of Table 1 and the relay capability information included in the SBC-RSP message of Table 2 may have the same encoding type. In order to distinguish the meaning of the relay capability information included in the description, the description is divided into two tables.

Thereafter, the node 400 and the base station 410 that have completed the basic function negotiation procedure through steps 415 to 419 perform an authentication procedure necessary for communication in step 421. The authentication procedure may vary depending on whether the relay station function is supported in steps 415 to 419. Since the authentication procedure is not directly related to the present invention, a detailed description thereof will be omitted. In step 423, the node 400 performs a registration procedure with the base station 410.

FIG. 5 illustrates a signal flow between a node, an upper relay station, and a base station for negotiation of relay station function support during relay communication with an upper relay station in a broadband wireless communication system using a multi-hop relay method according to an embodiment of the present invention. .

Referring to FIG. 5, the node 500 first determines the upper relay station 540 as a serving station as it is powered on in step 511, and receives a downlink preamble transmitted by the upper relay station 540 to receive the upper relay station. Obtain system synchronization. Thereafter, the node 500 performs an initial ranging procedure with the upper relay station 540 in step 513, and transmits an SBC-REQ message to perform a basic capability negotiation procedure with the upper relay station 540 in step 515. send. Here, the SBC-REQ message includes basic capability information that the node 500 can support, such as a physical layer parameter, and includes relay capability information of Table 1 below. In step 517, the upper relay station 540 determines whether the node 500 supports the relay station function from the received SBC-REQ message.

If it is determined that the node 500 can support the relay station function, the upper relay station 540 proceeds to step 519 in order to inform the base station 510 of the relay capability information of the node 500 to the SBC-REQ message. To pass. The SBC-REQ message includes identifier information for identifying the node 500 and the relay capability information of Table 1 included in the SBC-REQ message received in step 515. Here, the identifier information may be a MAC address of the node 500 or a basic CID allocated to the node.

Thereafter, the base station 510 receives the relay capability information of the node 500 and determines whether to select the node 500 as a relay station in step 521. The criterion for determining the relay station may include expanding a service area of the base station 510 and increasing system capacity. Thereafter, the base station 510 proceeds to step 523 and transmits an SBC-RSP message including the decision of step 521 to the upper relay station 540. At this time, the SBC-RSP message may include the identifier information of the node 500 and the relay capability information of the <Table 2> indicating the decision of the step 521. That is, the relay capability information of <Table 2> included in the SBC-RSP message indicates whether the node 500 can perform a relay station function.

Thereafter, the upper relay station 540 receives the SBC-RSP message, and in step 525, the node included in the relay capability information of the <Table 2> determined by the base station 510 and the SBC-REQ message in step 515. A SBC-RSP message including information corresponding to other basic function information of 500 is constructed and transmitted to the node 500. At this time, when the node 500 receives the SBC-RSP message in which Bit # 0 of the RS capability encoding value of Table 2 is 1, the node 500 operates as a relay station.

Here, in steps 519 and 523, the method of transmitting the relay capability information of the node 500 by the upper relay station 540 and the base station 510 may use a new message instead of the SBC-REQ / RSP message described above. In this case, the new message may include the identifier of the node 500 and the relay capability information of the node 500. In addition, when the relay station function of the node 500 is allowed, the preamble information of the node 500 may be included in the message providing the relay capability information in addition to the relay capability information.

Thereafter, the node 500, the higher relay station 540, and the base station 510, which have completed the basic function negotiation procedures of steps 515 to 525, perform an authentication procedure necessary for communication in step 527. Here, the authentication procedure may vary depending on whether the node 500 functions as the relay station determined in the basic function negotiation procedure. Since the authentication procedure is not directly related to the present invention, a detailed description thereof will be omitted. In step 529, the node 500 performs a registration procedure with the base station 510 through the upper relay station 540.

On the other hand, when the upper relay station 540 receives the SBC-REQ message of step 515 in which Bit # 0 of the encoding value of the RS capability is set to 0, the upper relay station 540 causes the node 500 to perform the relay station function. You may decide that you cannot apply. In this case, since the base station 510 does not need to determine the function of the relay station setting of the node 500, steps 519 and 523 may be omitted.

4 and 5 illustrate a process in which a node determines support for a relay station function by exchanging the SBC-REQ message and the SBC-RSP message in a basic capability negotiation procedure of an initial access procedure. The relay station function support negotiation process may be performed during the initial access procedure other than the basic capability negotiation procedure. As another embodiment of the present invention, the relay station function support negotiation process is performed during the registration procedure with reference to FIGS. 6 and 7. The operation will be described.

6 illustrates a signal flow between a node and a base station for negotiation of a relay station function support during direct communication with a base station in a broadband wireless communication system using a multi-hop relay method according to another embodiment of the present invention.

Referring to FIG. 6, the node 600 first determines the base station 610 as a serving station as it is powered on in step 611, and receives a downlink preamble transmitted from the base station 610 to receive the downlink preamble. Obtain system synchronization. In step 613, the node 600 performs an initial ranging procedure with the base station 610, and exchanges an SBC-REQ message and an SBC-RSP message with the base station 610 in step 615. Perform the procedure. The SBC-REQ message and the SBC-RSP message include basic capability information that can be supported by the node 600 to perform communication with the base station 610, for example, a physical layer parameter. In step 617, the node 600 performs an authentication procedure required for communication with the base station 610.

In step 619, the node 600 transmits a REG-REQ message to perform a registration procedure with the base station 610. Here, the REG-REQ message may include relay capability information on whether the node 600 supports the relay station capability as shown in Table 1. In this case, the base station 610 receives the REG-REQ message and determines whether to select the node 600 as a relay station in step 621. Here, the criterion for selecting the relay station may include expanding the service area of the base station 610 and increasing system capacity. In step 623, the base station 610 transmits a REG-RSP message including the decision of step 621 in response to the REG-REQ message. Here, the REG-RSP message includes all parameters corresponding to the parameters included in the REG-REQ message. For example, when the base station 610 receives the REG-REQ message including the relay capability information of Table 1, the base station 610 includes a parameter corresponding to the relay capability information of Table 1. REG-RSP message including relay capability information of table 2 shall be transmitted. If Bit # 0 is 1 among the encoding values of the RS capability of the <Table 2>, it means that the base station 610 allows the relay station function of the node 600. Here, the Bit # Receiving the REG-RSP message with 0 equal to 1, the node 600 operates as a relay station. Alternatively, when Bit # 0 is not 1 among the encoding values of the RS capability of the REG-REQ message received by the base station 610 in step 619, the node 600 does not support the relay station function. ) Must not set Bit # 0 to 1 in the encoding value of the RS capability of the REG-RSP message.

In addition, Bit # 1 to Bit # 5 among the encoding values of the RS capability may allow the fixed relay station function, the nomadic relay station function, the mobile relay station function, or the infrastructure relay station function of the node 600 to be allowed. Indicates whether to allow or allow client relay functions. Here, Bit # 1 to Bit # 5 of the encoding value of the RS capability should be set according to the RS capability encoding information of the REG-REQ message received in step 619, and the function is not supported by the node 600. The corresponding bit value should be set to zero.

Meanwhile, when Bit # 0 is 1 of the encoding values of the RS capability of the REG-RSP message received by the node 600 in step 623, that is, the base station 610 allows the relay station function of the node 600. In one case, the preamble information of the node 600 may be included in the REG-RSP message.

Here, the preamble information of the node allowed for the relay station function included in the REG-RSP message according to the present invention is as shown in Table 3 below.

Name Type (1 byte) Length (bytes) Value RS preamble info TBD One information of RS preamble

As shown in Table 3, the preamble encoding information according to the present invention includes the name of the encoding (RS preamble info), the encoding type (TBD), the encoding size (1 byte), and the relay station function. It includes an encoding value corresponding to preamble information of the allowed node. The preamble information includes information capable of distinguishing a preamble index or the preamble sequence corresponding to a preamble sequence to be transmitted by the node 600 performing a relay station function in the preamble transmission region of the node.

Accordingly, upon receiving the REG-RSP message of step 623, the node 600 determined to perform the RS function transmits a preamble sequence corresponding to the preamble information of Table 3 below. Here, operations related to the method of configuring the preamble sequence and the method of transmitting the preamble of the node 600 are beyond the scope of the present invention, and thus detailed description thereof will be omitted.

Meanwhile, the relay capability information of <Table 1> included in the REG-REQ message and the relay capability information of <Table 2> included in the REG-RSP message may have the same encoding type. In order to distinguish the meaning of the relay capability information included in each message, the description is divided into two tables.

FIG. 7 illustrates a signal flow between a node, an upper relay station, and a base station for negotiation of relay station function support during relay communication with an upper relay station in a broadband wireless communication system using a multi-hop relay method according to another embodiment of the present invention. .

Referring to FIG. 7, the node 700 first determines the upper relay station 740 as a serving station as it is powered on in step 711 and receives a downlink preamble transmitted from the upper relay station 740 to the upper relay station. Obtain system synchronization. Thereafter, the node 700 performs an initial ranging procedure with the upper relay station 740 in step 713, and performs an SBC-REQ message to perform a basic capability negotiation procedure with the upper relay station 740 in step 715. And exchange SBC-RSP messages. The SBC-REQ message and the SBC-RSP message include basic capability information that the node 700 can support, such as a physical layer parameter. In step 717, the node 700 performs an authentication procedure required for communication with the upper relay station 740 and the base station 710.

Thereafter, the node 700 transmits a REG-REQ message to the upper relay station 740 in step 719 to perform the registration procedure with the base station 710 through the upper relay station 740. The REG-REQ message may include relay capability information on whether the node 700 supports relay station capability according to the present invention as shown in Table 1 above. In step 721, the upper RS 740 determines whether the node 700 supports the RS function using the received REG-REQ message.

When it is determined that the node 700 can support the relay station function, the upper relay station 740 proceeds to step 723 to relay information about whether the node 700 supports the relay station capability to the base station 710. Pass a REG-REQ message to inform. Here, the REG-REQ message includes identifier information for identifying the node 700 and relay capability information of Table 1 included in the REG-REQ message received in step 719. Here, the identifier information may be a MAC address of the node 700 or a basic CID allocated to the node 700.

Thereafter, the base station 710 receives the relay capability information of the node 700 and determines whether to select the node 700 as a relay station in step 725. The criterion for determining the relay station may include expanding a service area of the base station 710 and increasing system capacity. Thereafter, the base station 710 proceeds to step 727 and delivers a REG-RSP message including the determination of step 725 to the upper relay station 740. Here, the REG-RSP message may include the identifier information of the node 700 and the relay capability information of the <Table 2> indicating the decision of the step 725. That is, the relay capability information of <Table 2> included in the REG-RSP message indicates whether the node 700 can perform a relay station function. In addition, when the base station 710 determines that the node 700 performs the relay station function, in step 727, the base station 710 transmits the REG-RSP message transmitted by the base station 710 to the node 700. The relay station may include preamble information.

Then, the upper RS 740 receiving the REG-RSP message is included in the relay capability information of Table 2 determined by the BS 710 in step 729 and the REG-REQ message in step 719. A REG-RSP message including information corresponding to other functional information necessary for the registration procedure of the node 700 is constructed and transmitted to the node 700. Here, the upper relay station 740 sets the bit # 0 of the RS capability encoding value of the <Table 2> from the base station 710 to 1 and preamble information of the node 700 corresponding to the <Table 3>. When the REG-RSP message including the message is received, the same information is included in the REG-RSP message transmitted from the upper relay station 740 to the node 700 in step 729. Thereafter, when the node 700 receives the REG-RSP message in which Bit # 0 of the RS capability encoding value of the <Table 2> is 1, the node 700 operates as a relay station, and the <Table 3>. It transmits its own preamble sequence using the preamble information.

Here, in steps 723 and 727, the method of transmitting the relay capability information of the node 700 to the base station 710 by the upper relay station 740 may use a new message instead of the REG-REQ / RSP message. The identifier of the node 700, the relay capability information of the node 700, and the preamble information of the node 700 may be included.

On the other hand, when the upper relay station 740 receives the REG-REQ message of step 719 in which Bit # 0 of the encoding value of the RS capability is set to 0, the upper relay station 740 causes the node 700 to function as a relay station. It is possible to determine that it is not possible, and thus, the process of determining the relay station function setting of the node 700 by the base station 710 is unnecessary, so steps 723 and 727 for determining the function of the relay station of the node 700 are performed. May be omitted.

9 is a diagram illustrating signal flow between a node, an upper relay station, and a base station for negotiation of relay station function support in a broadband wireless communication system using a multi-hop relay method according to another embodiment of the present invention. Here, the upper relay station may not read the message information exchanged between the node and the base station and may simply perform a function of forwarding the message.

Referring to FIG. 9, first, the node 900 acquires synchronization with the upper relay station 940 in step 911, and then establishes communication with the base station 910 through the upper relay station 940 in step 913. Request message (REQ MSG) to the upper relay station 940. Here, the request message includes relay capability information on whether the node 900 supports the relay station capability. In this case, the upper RS 940 forwards the request message to the BS 910 in step 915.

After receiving the request message, the base station 910 processes the content of the request message in step 917, and processes the relay capability information of the node 900 by processing the relay capability information of the node 900 according to the present invention. After the determination, the process proceeds to step 919 to transmit a response message (RSP MSG) including relay capability information on whether the node 900 has been selected as a relay station to the upper relay station 940. In step 921, the upper relay station 940 receiving the response message forwards the response message to the node 900.

In this case, in step 919, the base station 910 that transmits the response message to the upper relay station 940 performs communication between the relay capability information and the node 900 and the upper relay station 940. An indication message (INDICATE MSG) including necessary parameter information and the like is transmitted to the upper relay station 940. In step 925, the upper relay station 940 obtains relay capability information on whether the node 900 is selected as a relay station and parameter information necessary for performing communication with the node from the indication message.

Hereinafter, a block diagram of a node, an upper relay station (RS), and a base station (BS) according to the present invention will be described. Since the node, the upper relay station RS, and the base station BS having the same interface module (communication module) have the same block configuration, the following description will describe operations of the node, upper relay station, and base station with one device. do.

8 is a block diagram of a node (or higher relay station or base station) according to an embodiment of the present invention. The following description will focus on the control message processing.

First, referring to FIG. 8, the configuration of a node, the controller 801 controls the overall operation of the node. For example, it performs processing and control for voice call and data communication, and handles the relay station function negotiation related operation according to the present invention in addition to the usual functions. According to the present invention, the control unit 801 provides a control message received from an upper relay station or base station to the message processing unit 803, and receives a message to be transmitted to the upper relay station or base station from the message generating unit 805 in the interface. Provided to module 811.

The message processing unit 803 decomposes a control message received from an upper relay station or a base station and notifies the control unit 801 of the result. When receiving the SBC-RSP message or REG-RSP message including the relay capability information of Table 2 according to the present invention, the control unit extracts various control information included in the message including the relay capability information; 801). At this time, the control unit 801 controls the relay station function negotiation information processing unit 807 according to the control information from the message processing unit 803.

The message generator 805 generates an SBC-REQ message or a REG-RSP message including the relay capability information of the <Table 1> to be transmitted to an upper relay station or a base station under the control of the controller 801. The message generated by the message generator 805 is transferred to the interface module 811 through the controller 801.

The relay station function negotiation information processing unit 807 provides the control unit 801 with information for processing a necessary communication procedure with a higher relay station or a base station according to the relay station function information parameters under the control of the control unit 801. .

The storage unit 809 stores a program for controlling the overall operation of the node and temporary data generated during program execution. That is, the storage unit 809 may generally store data and control information to be transmitted to a higher relay station or base station by a node.

The interface module 811 is a module for communicating with an upper relay station or a base station, and includes an RF processor and a baseband processor. The RF processor converts a signal received through an antenna into a baseband signal and provides the baseband signal to the baseband processor, and transmits a baseband signal from the baseband processor on an actual air. Transmit to and transmit through the antenna. For example, in case of using a broadband wireless access method, the baseband processor transmits the original Fourier Transform (FFT) and channel decodes the signal from the RF processor and transmits original information data to the controller 801. On the contrary, channel encoding and inverse fast fourier transform (IFFT) operations are performed on the data from the controller 801 and provided to the RF processor.

Next, referring to FIG. 8, the configuration of the upper relay station, the controller 801 controls the overall operation of the upper relay station. For example, it performs processing and control for voice calls and data communications, and handles operations related to relay station function negotiations in accordance with the present invention in addition to conventional functions. According to the present invention, the control unit 801 provides a control message received from a node or a base station to the message processing unit 803, receives a message to be transmitted to the node or base station from the message generating unit 805, the interface module ( 811).

The message processor 803 decomposes a control message received from a node or a base station and notifies the controller 801 of the result. When the SBC-REQ message or the REG-RSP message including the relay capability information of Table 1 is received from a node according to the present invention, or the SBC-RSP including the relay capability information of Table 2 from the base station is received. When a message, a REG-RSP message, or a corresponding message is received, various control information included in the received message is extracted and provided to the controller 801. At this time, the controller 801 performs the processing according to the control information from the message processor 803.

The message generator 805 generates an SBC-REQ message or a REG-RSP message or a corresponding message including the relay capability information of Table 1 to be transmitted to a base station under the control of the controller 801, A SBC-RSP message or a REG-RSP message including the relay capability information of Table 2 to be transmitted to the node is generated and provided to the controller 801. Here, the message generated by the message generator 805 is transferred to the interface module 811 through the controller 801.

The relay station function negotiation information processing unit 807 performs a function of managing relay capability information to be provided to a node managed by the upper relay station under the control of the controller 801.

The storage unit 809 stores a program for controlling the overall operation of the upper relay station and temporary data generated during program execution. That is, the storage unit 809 may store data and control information to be transmitted to a node or a base station.

The interface module 811 is a module for communicating with a node or a base station, and includes an RF processor and a baseband processor. The RF processor converts a signal received through an antenna into a baseband signal and provides the baseband signal to the baseband processor, and transmits a baseband signal from the baseband processor on an actual air. Transmit to and transmit through the antenna. For example, when using a broadband wireless access method, the baseband processor controls the fast Fourier transform (FFT) and channel decodes a signal from the RF processor to control the original information data (traffic or control message). To pass). On the contrary, channel data and IFFT (Inverse Fast Fourier Transform) calculation are performed on the information data from the controller 801 and provided to the RF processor.

Next, referring to FIG. 8, the configuration of the base station, the controller 801 controls the overall operation of the base station. For example, it performs processing and control for voice calls and data communications, and handles operations related to relay station function negotiation procedures of nodes according to the present invention in addition to the usual functions. According to the present invention, the control unit 801 provides a control message received from a node or an upper relay station to the message processing unit 803 and receives a message to be transmitted to the node or higher relay station from the message generator 805 in the interface. Provided to module 811.

The message processing unit 803 decomposes a control message received from a node or a higher level relay station and notifies the control unit 801 of the result. According to the present invention, when the SBC-REQ message or the REG-RSP message including the relay capability information of the <Table 1> or the corresponding message is received from the upper relay station or the relay capability information of the <Table 1> from the node When an SBC-REQ message or a REG-RSP message including a message is received, various control information included in the received message is extracted and provided to the controller 801. At this time, the controller 801 performs the processing according to the control information from the message processor 803.

The message generator 805 generates a message to be transmitted to a node or an upper relay station under the control of the controller 801 and provides the message to the controller 801. According to the present invention, an SBC-RSP message or a REG-RSP message including the relay capability information of Table 2 to be transmitted to the node is generated and provided to the controller 801. Alternatively, according to the present invention, an SBC-RSP message or a REG-RSP message or a corresponding message including the relay capability information of the <Table 2> to be transmitted to the upper relay station is generated and provided to the controller 801. Alternatively, the REG-RSP message or the corresponding message including the preamble information of the node determined to perform the relay station function according to the present invention is generated and provided to the controller 819. Here, the message generated by the message generator 805 is transferred to the interface module 811 through the controller 801.

The relay station function negotiation information processing unit 807 performs a function of managing nodes performing a relay station function negotiation procedure under the control of the controller 801. In addition, the relay station function negotiation information processing unit 807 according to the present invention is a function for determining a decision function for selecting a node supporting the relay station function as a relay station and preamble information corresponding to the relay station determined to support the relay station function. Do this.

The storage unit 809 stores a program for controlling the overall operation of the base station and temporary data generated during program execution. That is, the storage unit 809 may generally store data and control information to be transmitted to a node or an upper relay station.

The interface module 811 is a module for communicating with a node or an upper relay station, and includes an RF processor, a baseband processor, and the like. The RF processor converts a signal received through an antenna into a baseband signal and provides the baseband signal to the baseband processor, and transmits a baseband signal from the baseband processor on an actual air. Transmit to and transmit through the antenna. For example, when using a broadband wireless access method, the baseband processor controls the fast Fourier transform (FFT) and channel decodes a signal from the RF processor to control the original information data (traffic or control message). To pass). On the contrary, channel data and IFFT (Inverse Fast Fourier Transform) calculation are performed on the information data from the controller 801 and provided to the RF processor.

In the above configuration of the node, the upper relay station, and the base station, the control unit 801 controls the message processing unit 803, the message generating unit 805, and the relay station function negotiation information processing unit 807. The controller 801 may perform functions of the message processor 803, the message generator 805, and the relay station function negotiation information processor 807. In the present invention, it is shown to configure them separately to explain each function separately. Therefore, in the case of actually implementing a product, all of them may be configured to be processed by the controller 801, and only some of them may be configured to be processed by the controller 801.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention provides a broadband wireless access communication system using an OFDM / OFDMA scheme, in particular, a relay station capable of providing a multi-hop relay path between the MS and the base station when the direct link channel situation between the base station and the MS is poor. In a multi-hop relay broadband wireless communication system using a node, a node supporting a relay station function may perform a relay station function negotiation procedure with a serving base station while performing an initial access procedure, thereby determining whether the node operates. There is an advantage that can provide the necessary signaling procedure. In addition, there is an advantage that can provide the same service and function to the MS through the relay station to perform the communication using the direct link with the base station.

Claims (58)

In a method for negotiating relay station function in a communication system, The node constructing a first message including first relay capability information on whether the node supports the relay station capability, and transmitting the first message to the base station; The base station receiving the first message determines whether to select the node as a relay station, and constructs a second message including second relay capability information on whether the node is selected as a relay station according to the determination. Transmitting to the node; And receiving, by the node receiving the second message, a role of a relay station or a role of a general node according to the received second relay capability information. The method of claim 1, And before the first message is configured, the node acquires system synchronization with the base station and performs an initial ranging procedure. The method of claim 2, Before performing the role of the relay station or the normal node, the node receiving the second message further comprises performing an authentication procedure and a registration procedure with the base station. The method of claim 1, And before the first message is configured, the node acquires system synchronization with the base station, and performs an initial ranging procedure, a basic capability negotiation procedure, and an authentication procedure. The method of claim 1, If the base station determines the node as a relay station, generating the second message further including relay station preamble information and transmitting the generated second message to the node. The method of claim 5, And receiving, by the node receiving the second message, a role of a relay station, and transmitting a preamble sequence of the node by using the preamble information. The method of claim 1, And the criterion of the determination is at least one of expanding a service area of the base station and increasing system capacity. The method of claim 1, The relay station may be at least one of an infrastructure relay station installed and managed by a base station, a client relay station supporting a relay function by a mobile terminal, a fixed relay station without mobility, a nomadic relay station having nomadic characteristics, and a mobile relay station. How to. In a method for negotiating relay station function in a communication system, Configuring, by the node, a first message including first relay capability information on whether the node supports the relay station capability, and transmitting the first message to a higher relay station; The upper relay station receiving the first message determines whether the node can support the relay station function, and if it is determined that the node supports the relay station function, the upper relay station includes first relay capability information and identifier information of the node. Constructing a second message and transmitting the second message to the base station; The base station receiving the second message determines whether to select the node as a relay station, and includes second relay capability information on whether the node is selected as a relay station and identifier information of the node according to the determination. Constructing a third message and transmitting the third message to the upper relay station; Transmitting, by the upper relay station that has received the third message, a fourth message including the second relay capability information to the node; And receiving, by the node receiving the fourth message, a role of a relay station or a role of a normal node according to the second relay capability information. The method of claim 9, And before the first message is configured, the node acquires system synchronization with the upper relay station and performs an initial ranging procedure. The method of claim 10, And before performing the role of the relay station or the general node, the node receiving the fourth message performs an authentication procedure and a registration procedure with the upper relay station and the base station. The method of claim 9, Before the first message is configured, the node acquires system synchronization with the upper relay station, performs an initial ranging procedure and a basic capability negotiation procedure, and then performs an authentication procedure with the upper relay station and the base station. Method comprising a. The method of claim 9, When the base station determines the node as a relay station, constructing the third message further including relay station preamble information and transmitting the same to the upper relay station; And configuring, by the upper relay station receiving the third message, the fourth message further including the relay station preamble information to the node. The method of claim 13, And receiving, by the node receiving the fourth message, a role of a relay station, and transmitting a preamble sequence of the node using the preamble information. The method of claim 9, And the criterion of the determination is at least one of expanding a service area of the base station and increasing system capacity. The method of claim 9, The relay station may be at least one of an infrastructure relay station installed and managed by a base station, a client relay station supporting a relay function by a mobile terminal, a fixed relay station without mobility, a nomadic relay station having nomadic characteristics, and a mobile relay station. How to. An apparatus for negotiating relay station function in a communication system, A second message including a first relay capability information on whether a node supports relay station capability and configured to be transmitted to a base station, and a second message including second relay capability information on whether the node is selected as a relay station from the base station; When the message is received, the node performing a role of a relay station or a role of a normal node according to the second relay capability information; Upon receiving a first message from the node, determine whether to select the node as a relay station, and construct a second message that includes second relay capability information as to whether the node is selected as a relay station in accordance with the determination. And the base station for transmitting to the node. The method of claim 17, The relay station may be at least one of an infrastructure relay station installed and managed by a base station, a client relay station supporting a relay function by a mobile terminal, a fixed relay station without mobility, a nomadic relay station having nomadic characteristics, and a mobile relay station. Device. The method of claim 17, And the criterion of the determination is at least one of expanding a service area of the base station and increasing system capacity. The method of claim 17, And when the node is selected as the relay station, further comprising the base station for constructing and transmitting the second message to the node further including relay station preamble information. The method of claim 20, And receiving the second message further including the relay station preamble information from the base station, serving as a relay station, and transmitting its own preamble sequence using the preamble information. Device. An apparatus for negotiating relay station function of a node in a communication system, Constructing a first message including first relay capability information on whether a node supports relay station capability and transmitting the same to a higher relay station, and including second relay capability information on whether the node is selected as a relay station from an upper relay station; 4 When a message is received, a node performing the role of a relay station or a role of a general node according to the second relay capability information; When the first message is received from the node, it is determined whether the node supports the relay station function using the first message, and when it is determined that the node supports the relay station function, the first relay capability of the node. After constructing a second message including the information and the identifier information and transmitting to the base station, when receiving a third message including the second relay capability information and the identifier information of the node from the base station, the second relay capability The upper relay station for constructing and transmitting a fourth message including information to the node; When a second message is received from the upper relay station, it is determined whether to select the node as a relay station using the second message, and according to the determination, second relay capability information on whether the node is selected as a relay station. And the base station for constructing and transmitting a third message including identifier information of the node to the upper relay station. The method of claim 22, And the criterion of the determination is at least one of expanding a service area of the base station and increasing system capacity. The method of claim 22, The relay station may be at least one of an infrastructure relay station installed and managed by a base station, a client relay station supporting a relay function by a mobile terminal, a fixed relay station without mobility, a nomadic relay station having nomadic characteristics, and a mobile relay station. Device. The method of claim 22, And when the node is selected as the relay station, further comprising the base station for constructing the third message further including relay station preamble information and transmitting the same to the upper relay station. The method of claim 25, And when the third message including the relay station preamble information is further received from the base station, further comprising the upper relay station configured to transmit the node to the node by constructing the fourth message further including the relay station preamble information. Device. The method of claim 26, When the fourth message including the relay station preamble information is further received from the upper relay station, the node serves as a relay station, and further comprising the node for transmitting its own preamble sequence using the preamble information. Device characterized in that. A method for a node to negotiate relay station functions in a communication system, Constructing a first message including first relay capability information on whether the node supports the relay station capability; Transmitting the first message to an upper relay station or a base station; Receiving a second message including second relay capability information on whether the node is selected as a relay station from the upper relay station or the base station; And performing a role of a relay station or a role of a normal node according to the second relay capability information. The method of claim 28, And before the first message is configured, acquiring a system synchronization with the upper relay station or the base station and performing an initial ranging procedure. The method of claim 29, And performing an authentication procedure and a registration procedure with the base station after receiving the second message and before performing a role of a relay station or a general node. The method of claim 28, Before the first message is configured, acquiring a system synchronization with the upper relay station or the base station, and performing an initial ranging procedure, a basic capability negotiation procedure, and an authentication procedure. The method of claim 31, wherein Receiving the second message further including relay station preamble information from the upper relay station or the base station; And acting as a relay station according to the received information, and transmitting its own preamble sequence using the preamble information. A method for a base station to negotiate relay station functions in a communication system, Determining whether to select the node as a relay station when a first message including first relay capability information on whether to support relay station capability is received from a node or an upper relay station; Constructing a second message including second relay capability information on whether the node has been selected as a relay station in accordance with the determination; And transmitting the configured second message to the node or the upper relay station. The method of claim 33, wherein And the criterion of the determination is at least one of expanding a service area of the base station and increasing system capacity. The method of claim 33, wherein And performing a system synchronization acquisition procedure and an initial ranging procedure with the node before receiving the first message. The method of claim 33, wherein And after the transmitting of the second message, performing an authentication procedure and a registration procedure with the node. The method of claim 33, wherein And performing a system synchronization acquisition procedure, an initial ranging procedure, a basic capability negotiation procedure, and an authentication procedure with the node before receiving the first message. The method of claim 33, wherein And when the node is selected as a relay station, constructing the second message further including relay station preamble information. In a method for a higher relay station to negotiate relay station functions in a communication system, When a first message including first relay capability information on whether the node supports the relay station capability is received from the node, determining whether the node supports the relay station function using the first message; If it is determined that the relay station function support of the node is possible, constructing and transmitting a second message including the first relay capability information and the identifier information of the node to the base station; When a third message including second relay capability information on whether the node is selected as a relay station and an identifier information of the node is received from the base station, a fourth message including the second relay capability information is configured. Transmitting to the node. The method of claim 39, And performing a system synchronization acquisition procedure and an initial ranging procedure with the node before receiving the first message. The method of claim 39, And performing a system synchronization acquisition procedure, an initial ranging procedure, a basic capability negotiation procedure, and an authentication procedure with the node before receiving the first message. In a method for negotiating relay station function in a communication system, Configuring, by the node, a first message including first relay capability information on whether the node supports the relay station capability, and transmitting the first message to a higher relay station; Forwarding, by the upper relay station, the first message to a base station; The base station receiving the first message determines whether to select the node as a relay station, and configures a second message including second relay capability information on whether the node is selected as a relay station according to the determination. Sending to a higher relay station, Forwarding, by the upper relay station, the second message to the node; And receiving, by the node receiving the second message, a role of a relay station or a role of a general node according to the received second relay capability information. The method of claim 42, And before the first message is configured, the node acquiring a system synchronization with the upper relay station. The method of claim 42, After transmitting the second message, the base station further includes the step of transmitting an indication message (INDICATE MSG) including the second relay capability information and parameter information necessary for the node and the upper relay station to communicate with the higher relay station. Characterized in that. The method of claim 42, And the criterion of the determination is at least one of expanding a service area of the base station and increasing system capacity. The method of claim 42, The relay station may be at least one of an infrastructure relay station installed and managed by a base station, a client relay station supporting a relay function by a mobile terminal, a fixed relay station without mobility, a nomadic relay station having nomadic characteristics, and a mobile relay station. How to. The method of claim 42, The first message is a request message for establishing communication with a base station through a higher relay station. The method of claim 47, And the second message is a response message to the request message. delete An apparatus for negotiating relay station function in a communication system, A first message including first relay capability information on whether a node supports relay station capability is configured and transmitted to a higher relay station, and includes second relay capability information on whether the node is selected as a relay station from the upper relay station; When a second message is received, a node that performs the role of a relay station or a role of a normal node according to the second relay capability information; Forwarding the first message to a base station when the first message is received from the node, forwarding the second message to the node when the second message is received from the base station, and an indication message from the base station When the (INDICATE MSG) is received, the upper relay station obtaining second relay capability information of the node using the indication message; When the first message is received from the upper relay station, determines whether to select the node as a relay station using the first message, and according to the determination, a second relay capability as to whether the node is selected as a relay station; After constructing a second message including information and transmitting the same to the upper relay station, the second message includes the second relay capability information and parameter information necessary for the node and the upper relay station to perform communication. And said base station transmitting to an upper relay station. 51. The method of claim 50, And the criterion of the determination is at least one of expanding a service area of the base station and increasing system capacity. 51. The method of claim 50, The relay station may be at least one of an infrastructure relay station installed and managed by a base station, a client relay station supporting a relay function by a mobile terminal, a fixed relay station without mobility, a nomadic relay station having nomadic characteristics, and a mobile relay station. Device. 51. The method of claim 50, And wherein the first message is a request message for establishing communication with a base station through a higher relay station. The method of claim 53 wherein And the second message is a response message to the request message. delete In a method for a higher relay station to negotiate relay station functions in a communication system, Forwarding the first message to the base station when the first message including the first relay capability information on whether the node supports the relay station capability is received from the node; Forwarding the second message to the node when a second message including second relay capability information on whether the node is selected as a relay station from the base station is received. The method of claim 56, wherein After the second message forwarding, the second relay capability information of the node is received from the base station by receiving an indication message (INDICATE MSG) including the second relay capability information and parameter information necessary for the node and the upper relay station to perform communication. The method further comprising the step of obtaining. A method for a base station to negotiate relay station functions in a communication system, Determining whether to select the node as a relay station when a first message including first relay capability information on whether a node supports relay station capability is received from an upper relay station; Constructing a second message including second relay capability information on whether the node is selected as a relay station according to the determination, and transmitting the second message to the upper relay station; And sending an indication message (INDICATE MSG) including the second relay capability information and parameter information necessary for the node and the upper relay station to communicate with the higher relay station.

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